# gpasswd -a admin wheel

useradd -m -g users -G audio,disk,games,http,lp,network,optical,power,scannder,storage,sys,video,whell -g users -s /bin/bash user
passwd admin

groups user
gpasswd -d user wheel
passwd -l root

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Или так:

useradd -m -g users -G audio,disk,games,http,lp,network,optical,power,scannder,storage,sys,video,whell -g users -s /bin/bash user
passwd admin

useradd -m -g users -G audio,disk,games,http,lp,network,optical,power,scannder,storage,sys,video -g users -s /bin/bash user
passwd user

passwd -l root
